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Top Forums Shell Programming and Scripting how to make some condition when program/tool unsuccesfully ends with error.. Post 302405322 by Lukasito on Thursday 18th of March 2010 01:13:09 PM
Old 03-18-2010
Question how to make some condition when program/tool unsuccesfully ends with error..

Simply, when i have tool "pdftotext", "sed" or "wget" and if this tool make an error in converting or downloading or something, I want to terminate my script...something like:

if [ pdftotext throws error/exception ]; then
exit 1
fi

bud I dont know how..can you help guys?Smilie
 

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pdftotext(1)						      General Commands Manual						      pdftotext(1)

NAME
pdftotext - Portable Document Format (PDF) to text converter (version 3.00) SYNOPSIS
pdftotext [options] [PDF-file [text-file]] DESCRIPTION
Pdftotext converts Portable Document Format (PDF) files to plain text. Pdftotext reads the PDF file, PDF-file, and writes a text file, text-file. If text-file is not specified, pdftotext converts file.pdf to file.txt. If text-file is '-', the text is sent to stdout. OPTIONS
-f number Specifies the first page to convert. -l number Specifies the last page to convert. -r number Specifies the resolution, in DPI. The default is 72 DPI. -x number Specifies the x-coordinate of the crop area top left corner -y number Specifies the y-coordinate of the crop area top left corner -W number Specifies the width of crop area in pixels (default is 0) -H number Specifies the height of crop area in pixels (default is 0) -layout Maintain (as best as possible) the original physical layout of the text. The default is to 'undo' physical layout (columns, hyphen- ation, etc.) and output the text in reading order. -raw Keep the text in content stream order. This is a hack which often "undoes" column formatting, etc. Use of raw mode is no longer recommended. -htmlmeta Generate a simple HTML file, including the meta information. This simply wraps the text in <pre> and </pre> and prepends the meta headers. -bbox Generate an XHTML file containing bounding box information for each word in the file. -enc encoding-name Sets the encoding to use for text output. This defaults to "UTF-8". -listenc Lits the available encodings -eol unix | dos | mac Sets the end-of-line convention to use for text output. -nopgbrk Don't insert page breaks (form feed characters) between pages. -opw password Specify the owner password for the PDF file. Providing this will bypass all security restrictions. -upw password Specify the user password for the PDF file. -q Don't print any messages or errors. -v Print copyright and version information. -h Print usage information. (-help and --help are equivalent.) BUGS
Some PDF files contain fonts whose encodings have been mangled beyond recognition. There is no way (short of OCR) to extract text from these files. EXIT CODES
The Xpdf tools use the following exit codes: 0 No error. 1 Error opening a PDF file. 2 Error opening an output file. 3 Error related to PDF permissions. 99 Other error. AUTHOR
The pdftotext software and documentation are copyright 1996-2004 Glyph & Cog, LLC. pdffonts(1), pdfimages(1), pdfinfo(1), pdftocairo(1), pdftohtml(1), pdftoppm(1), pdftops(1) 22 January 2004 pdftotext(1)
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